| Food Preservative | |
| Antimicrobial |
It is commonly used as a food preservative for dried foods, as well as fruit concentrate juices.
It acts as an antimicrobial, inhibiting the growth of fungi and bacteria, thereby keeping food fresh and safe. |
| In beer and wine manufacturing, it is used as both a sterilizer and an antioxidant in the process of brewing beer or fermenting wine. | |
| Component | Industrial Grade | Food Grade | High Purity Grade |
| Appearance | White or yellowish crystalline powder | ||
| Assay(Na2S2O5 ) | 96.5%min | 97%min | 98%min |
| water insoluble matter | 0.05%max | 0.03%max | 0.02%max |
| Iron content(Fe) | 0.005%max | 0.003%max | 0.002%max |
| Arsenic content(As) | 0.0001%max | 0.0001%max | 0.0001%max |
| Pb | 0.0005%max | 0.0005%max | 0.0003%max |